The best transportation in Indonesia is hiring a car including driver at a car rental company with a good reputation. This is comfortable and affordable because of the relative low price.
There is a GPS navigation map of Jakarat but it isn't accurate. It's more a nice to have gadget.
Internet is very helpful to prepare your trip to Indonesia.
MyAsiaChannel has collected the best websites which answers all these questions. So you can find everything quick and easy.... A good start of your trip!
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